One popular way to read input from stdin is by using theScanner classand specifying theInput StreamasSystem.in. For example: Scannerscanner=newScanner(System.in);StringmyString=scanner.next();intmyInt=scanner.nextInt();scanner.close();System.out.println("myString is: "+myString);System.out....
importjava.io.IOException;importjava.io.FileInputStream;;publicclassTestFile{publicstaticvoidmain(String args[])throws IOException{try{FileInputStream rf=newFileInputStream("InputFromFile.java");int n=512;byte buffer[]=newbyte[n];while((rf.read(buffer,0,n)!=-1)&&(n...
所以 IBlockInputStream 也是一个接口,内部定义了读取数据的若干个 read 虚方法,而具体的实现逻辑则交给它的实现类来填充,IBlockOutputStream 同理。 总共有 60 多个类实现了 IBlockInputStream 接口,它们覆盖了 ClickHouse 数据摄取的方方面面。这些实现类大致可以分为三类:第一类用于处理数据定义的 DDL 操作,例如 ...
while循环会持续读取数据,直到没有更多数据可读(即read方法返回-1)。 每次调用inputStream.read(buffer)时,它会阻塞直到有一些数据可以读取,或者到达文件末尾。同样地,outputStream.write(buffer, 0, bytesRead)也会阻塞直到所有数据都被写入。 这个简单的例子演示了BIO的基本工作方式:它会阻塞等待I/O操作的完成。在...
"filename.txt");intdata;while((data=fileInputStream.read())!=-1){// 处理读取到的数据} ...
1userInput = TextIO.getlnInt(); 当计算机运行上面的语句时,它会等待用户输入一个整型数值。程序必须要等用户输入一个数字并且按下回车后才可以继续运行。然后函数就会返回用户输入的值,并且把它保存在 userInput 变量里。下面是一个完整的程序,它使用 TextIO.getlnInt 去读取一个用户输入的数并输出这个数的平方:...
String[] commands = {"system.exe","-get t"};Process proc = rt.exec(commands);InputStream stdin = proc.getInputStream(); InputStreamReader isr = new InputStreamReader(stdin);BufferedReader br = new BufferedReader(isr);String line = null; System.out.println("<OUTPUT>");while ( (line ...
faster. Below is a graph outlining the speed differences between this InputReader verses using a BufferedReader (the Java Scanner was too slow to make it on the graph). To get started using the InputReader look at the examples below on how to read various types of data from an input ...
( new InputStreamReader(stdInStreamFromDevice, Charsets.UTF_8)); } public void loadXMLConfiguration(String configuration, String loadType) throws IOException, SAXException { validateLoadType(loadType); configuration = configuration.trim(); if (!configuration.startsWith("<configuration")) { ...
Input input plugin中可以配置type, 会添加到每一条消息中, 完整例子参考https://github.com/childe/hangout/blob/master/conf/simpletest.yml#L5 type: nginx Stdin - Stdin: codec: plain hostname: true # if add hostname to event; default false ...